From e80dcfa9f6eb14f67f7a7bdf4ae7a596323e156c Mon Sep 17 00:00:00 2001
From: diva
Date: Thu, 15 Jan 2009 23:37:49 +0000
Subject: Eased the locking times of ScenePresences. No locks were removed,
 just the locking periods changed. * Added an additional lock in
 GetScenePresences() * Changed ForEachClient to use GetScenePresences()
 instead of the main ScenePresences dictionary, so that there is no need to
 lock.

---
 OpenSim/Region/Environment/Scenes/Scene.cs      | 55 ++++++++++++++-----------
 OpenSim/Region/Environment/Scenes/SceneGraph.cs | 15 +++++--
 2 files changed, 43 insertions(+), 27 deletions(-)

diff --git a/OpenSim/Region/Environment/Scenes/Scene.cs b/OpenSim/Region/Environment/Scenes/Scene.cs
index fad90fa..9c3aa96 100644
--- a/OpenSim/Region/Environment/Scenes/Scene.cs
+++ b/OpenSim/Region/Environment/Scenes/Scene.cs
@@ -3175,13 +3175,16 @@ namespace OpenSim.Region.Environment.Scenes
                 return;
             }
 
+            ScenePresence sp = null;
             lock (m_scenePresences)
             {
                 if (m_scenePresences.ContainsKey(remoteClient.AgentId))
-                {
-                    m_sceneGridService.RequestTeleportToLocation(m_scenePresences[remoteClient.AgentId], info.RegionHandle,
-                        position, Vector3.Zero, (uint)(TPFlags.SetLastToTarget | TPFlags.ViaLandmark));
-                }
+                    sp = m_scenePresences[remoteClient.AgentId];
+            }
+            if (sp != null)
+            {
+                m_sceneGridService.RequestTeleportToLocation(sp, info.RegionHandle,
+                    position, Vector3.Zero, (uint)(TPFlags.SetLastToTarget | TPFlags.ViaLandmark));
             }
         }
 
@@ -3417,36 +3420,40 @@ namespace OpenSim.Region.Environment.Scenes
         public void handleRequestGodlikePowers(UUID agentID, UUID sessionID, UUID token, bool godLike,
                                                IClientAPI controllingClient)
         {
+            ScenePresence sp = null;
+
             lock (m_scenePresences)
             {
                 // User needs to be logged into this sim
-                if (m_scenePresences.ContainsKey(agentID))
+                m_scenePresences.TryGetValue(agentID, out sp);
+            }
+
+            if (sp != null)
+            {
+                if (godLike == false)
                 {
-                    if (godLike == false)
-                    {
-                        m_scenePresences[agentID].GrantGodlikePowers(agentID, sessionID, token, godLike);
-                        return;
-                    }
+                    sp.GrantGodlikePowers(agentID, sessionID, token, godLike);
+                    return;
+                }
 
-                    // First check that this is the sim owner
-                    if (Permissions.IsGod(agentID))
+                // First check that this is the sim owner
+                if (Permissions.IsGod(agentID))
+                {
+                    // Next we check for spoofing.....
+                    UUID testSessionID = sp.ControllingClient.SessionId;
+                    if (sessionID == testSessionID)
                     {
-                        // Next we check for spoofing.....
-                        UUID testSessionID = m_scenePresences[agentID].ControllingClient.SessionId;
-                        if (sessionID == testSessionID)
+                        if (sessionID == controllingClient.SessionId)
                         {
-                            if (sessionID == controllingClient.SessionId)
-                            {
-                                //m_log.Info("godlike: " + godLike.ToString());
-                                m_scenePresences[agentID].GrantGodlikePowers(agentID, testSessionID, token, godLike);
-                            }
+                            //m_log.Info("godlike: " + godLike.ToString());
+                            sp.GrantGodlikePowers(agentID, testSessionID, token, godLike);
                         }
                     }
-                    else
-                    {
-                        m_dialogModule.SendAlertToUser(agentID, "Request for god powers denied");
-                    }
                 }
+                else
+                {
+                    m_dialogModule.SendAlertToUser(agentID, "Request for god powers denied");
+                }         
             }
         }
 
diff --git a/OpenSim/Region/Environment/Scenes/SceneGraph.cs b/OpenSim/Region/Environment/Scenes/SceneGraph.cs
index be2fb46..940aee6 100644
--- a/OpenSim/Region/Environment/Scenes/SceneGraph.cs
+++ b/OpenSim/Region/Environment/Scenes/SceneGraph.cs
@@ -774,7 +774,10 @@ namespace OpenSim.Region.Environment.Scenes
         /// <returns></returns>
         protected internal List<ScenePresence> GetScenePresences()
         {
-            return new List<ScenePresence>(ScenePresences.Values);
+            lock (ScenePresences)
+            {
+                return new List<ScenePresence>(ScenePresences.Values);
+            }
         }
 
         protected internal List<ScenePresence> GetAvatars()
@@ -1085,12 +1088,18 @@ namespace OpenSim.Region.Environment.Scenes
 
         protected internal void ForEachClient(Action<IClientAPI> action)
         {
-            lock (ScenePresences)
+            List<ScenePresence> splist = GetScenePresences();
+            foreach (ScenePresence presence in splist)
             {
-                foreach (ScenePresence presence in ScenePresences.Values)
+                try
                 {
                     action(presence.ControllingClient);
                 }
+                catch (Exception e)
+                {
+                    // Catch it and move on. This includes situations where splist has inconsistent info
+                    m_log.WarnFormat("[SCENE]: Problem processing action in ForEachClient: ", e.Message);
+                }
             }
         }
 
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